Tangency is controlled by the first two control points from a surface boundary , assuming that these points lie in one line 相切是由曲面边界的最初两个控制点控制的（假设这些点在一条线上） 。
Placement outline curves must be a closed profile . floor outline curves must be a closed profile . top outline curves must be a closed profile 如果任意选定轮廓曲线不是连续相切的，则显示以下消息。相邻曲线不必连续相切。
Two dice , 6 faces each represent one number , when thrown twice , how many different value of the sum of the results ? 无 sum 为 1 的 可能 一个等边三角形，边长为2 ，在三角形内从三个顶点各有一个边长为1的6分之一圆，三圆相切，问中间部分？
It then calculates the intersections of this ray and the imaginary sphere circumscribed by the particle quad . if no intersections occur , the ray is discarded 接下来计算这个光线和与粒子矩形相切虚拟球体的饿交点。如果没有交点，那么这条光线将被忽略。
When the third pretreatment method was adopted , microwave input power was 700w , gas pressure was 1000pa and substrate was tangent on plasma ball surface , diamond films showed higher nucleation density by contrast 经过对比采用方案基片处理方式，基片和等离子球处于相切位置时，在微波输入功率700w和反应气压1000pa时沉积工艺参数时，基片成核密度较高。
Sdh - based mstp can build networks of rings or tangency rings , so it has strong ability of constructing networks , which means it may used for multiple service types such as point - to - point , multi - point - sharing or convergence 在系统的设计中应用了vlan技术、 lcas协议、 gfp laps封装技术，基于sdh的mstp可组成环状网、相切环等拓扑结构，具有很强的组网能力。
Send a specified electrical signal to the underground cable , when the probe is vertical cutting to the magnetic horizon , the signal is smallest ( almost to zero ) . we can find the locationand depth of the cable according to this principle 通过向地下管道发送出特定的电磁波信号，探测仪利用探头与磁力线地平面垂直相切时，收到的信号最小（几乎为零）的原理来测定埋地电缆的走向和深度。
Compared with the initial value problem , the weak entropy solution of the initial - boundary value problem includes the following new interaction type : a central rarefaction wave collides with the boundary and the boundary reflects a new shock wave which is tangent to the boundary 与初始值问题相比较，初边值问题的弱熵解包含了以下新的相互作用类型：中心稀疏波与边界相撞，边界反射出一个与之相切的新激波。
In the first chapter , we introduce the concept and properties of the bezier curves . the question of continuity and modification of the bezier curves is given . and we introduce the context and produce of the question of the taffeta curve with given tangent polygon 第一章综述已有的结果，介绍了b zier曲线的定义及其基本性质，指出b zier曲线存在的连接和修改问题，并介绍了与给定多边形相切的光滑曲线问题的背景和已有成果。
In the forth chapter , we proposes an approach of constructing planar piecewise bezier curve of 3rd 4th and 6th degree with all edges tangent to a given control polygon and the curve segments are joined together with c1 c2 and c3 - continuity . the segmented bezier curves are all shape - preserving to their tangent polygon 第四章讨论与给定多边形相切的分段三次、四次、六次b zier曲线，所构造的曲线c ~ 1 、 c ~ 2 、 c ~ 3 -连续，并且对切线多边形是保形的。
